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8-6
Applications
Trip Circuit Supervision
(cont.)
857-UM001A-EN-P – July 2009
Figure 8.7 – Trip Circuit Supervision when the Circuit-Breaker is Open
Note: The supervised circuitry in
this CB position is doubled-lined.
The value for R1 in this application
is 3k3 and 2W. These can be
calculated from the resistance and
voltage operating range of the coil of
K1 and the tolerance of the wetting
voltage.
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